Improvement in packings for pump-pistons



-NITED STATES PATENT OFFICE..

JOHN CARTER, OF PHILADELPHIA, PENNSYLVANI.

Specificationy forming part of Letters Patent No. 54,295, dated May 1, 1866.

To all whom it may concern:

Be itknown that I, JOHN CARTER, of Philadelphia, in the county of Philadelphia, in the State of Pennsylvania, have invented a new and Improved Expanding Packing for Pumps; and I do hereby declare that the following is a full and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, in whicha ringor washer; E, an expanding shell orring with a longitudinal slit at c on Fig. 4. F and C are following-nuts, and H is a leather pack-A lng.

The body of the piston C, when the leather packing H incloses it, is turned oonically, and a portion below the leather packing has a screw cut on the outside for the nuts F and Gr to run upon. The shellE is turned out conically to the same taper with the body on which it is placed, and is turned off on the outsidecylindrically, and a longitudinal or diagonal slit is cut along it. The object of' this construction is that by forcing the ring D, by the following-nuts F and G, against the thicker end of the shell E, it will expand as a wedge and distend the packing H, (which packing may be made in cross-rings edgewise ot1 leather, as shown, or otherwise,) and thus compensate for wear in use, allowing the packing to be turned oft' if it has worn unequally.

What l claim and desire to secure by Letters Patent, is-

The expanding lpacking H and wedge E upon the conical body C, all combined andarranged substantially as described.

JOHN CARTER.

Witnesses:

RoB'r. BRIGGS, L. M. HALLOWELL. 

